Mongodb之pymongo

一 ，pymongo模块的下载与使用

首先需要安装

pip install pymongo

二，使用

使用方法与数据库操作基本相同

1，连接

import pymongo

mongo_client = pymongo.MongoClient(host="127.0.0.1", port=27017)
mongo_db = mongo_client["day117"]

2，查

res = mongo_db.sado.find()
print(res)  # <pymongo.cursor.Cursor object at 0x0000028DEAAD03C8>  类似生成器

for data in res:
    print(data)

res = mongo_db.sado.find_one({"name": "sado"})
print(res)
print(res.get("_id"))

3，增

res = mongo_db.sado.insert_one({"who":"sado", "content":"今天天气怎么样？", "datatime": time.time()})  # 插入单条
res = mongo_db.sado.insert_one({"who":"ai", "content":"请问要查询哪所城市？", "datatime": time.time()})
print(res, res.inserted_id)

res = mongo_db.sado.insert_many([{}, {}, {}])  # 插入多条
print(res, res.inserted_ids)

 

4，改

res = mongo_db.sado.update_one({"name": "sado"}, {"$set": {"age": 21}})
print(res, res.modified_count)

res = mongo_db.sado.update_many({"age": {"$gte": 18}}, {"$set": {"age": 23}})
print(res, res.modified_count)

5，删

res = mongo_db.sado.delete_one({"$or": [{"name": "sado"}, {"name":"sola"}]})
print(res, res.deleted_count)

res = mongo_db.sado.delete_many({})  # 删除所有数据
print(res, res.deleted_count)